Reduced Maintenance: Fixed-orifice engineering eliminates the need for field air adjustments

this rebuild kit is the solution

The high-sensitivity chemically treated moisture indicator element transitions color to signal when moisture ingress exceeds acceptable PPM thresholds

providing a seamless field 1:1 replacement for White-Rodgers equipped systems

Lennox 18J15 Orifice 321894-706 Reduced Maintenance: Fixed-orifice engineering eliminatesThe Lennox 18J15 Brown Inducer Orifice is a critical combustion component designed specifically for direct vent and high efficiency gas furnaces. Rated at a 0. 113 inch diameter, this precision machined orifice regulates the fuel to air ratio within the inducer assembly to ensure stable ignition and flame rectification. As a genuine Lennox replacement part, it addresses common diagnostic codes related to pressure switch failures or improper venting.